Added equality methods to Choices objects, and overrode + for Choices
for easy concatenation with other Choices and choice-like iterables.
Also wrote tests for them, and extended the readme to reflect this
Added self to Authors file
Corrected typo
Merge remote-tracking branch 'upstream/master'

Conflicts:
	README.rst
Moved documentation for Choices field to the right place
Removed redundant inequality method on Choices
Alphabetised authors
Added tests to improve coverage
Add Changelog note about Choices equality/addition.